Sample 2 > Imported Class > Flashcards

Imported Class Flashcards

(129 cards)

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1
Q

<p>3</p>

A

<p>three</p>

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2
Q

<p>melissa & company</p>

A

<p>sample</p>

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3
Q

<p>sample</p>

A

<p>s</p>

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4
Q

<p><span>2</span></p>

A

<p><span>two</span></p>

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5
Q

<p>beta</p>

A

<p>b</p>

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6
Q

<p>alpha</p>

A

<p>1</p>

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7
Q

<p>m + 2 = 3</p>

A

<p>test</p>

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8
Q

<p><span>- Sight (vision)</span></p>

<p><span>- Hearing (audition)</span></p>

<p><span>- Chemical senses</span></p>

<p><span>Smell (olfaction)</span></p>

<p><span>Taste (gustation)</span></p>

<p><span>- Body senses</span></p>

<p><span>Somatosensation</span></p>

<p><span>- Touch (taction/haptics)</span></p>

<p><span>- Proprioception</span></p>

<p><span>Balance (equilibrioception)</span></p>

A

<p><span>sample</span></p>

<p></p>

<p><img></img></p>

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9
Q

<p>chi</p>

A

<p>sample</p>

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10
Q

<p><span>sample</span></p>

<p></p>

A

<p><span>sample small</span></p>

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11
Q

one

A

einer

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12
Q

two

A

zwei

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13
Q

three

A

drei

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14
Q

four

A

vier

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15
Q

five

A

fünf

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16
Q

<p>What types of wine should I pair with my takeout meal?</p>

A

<p>sample video</p>

<p></p>

<p><a>https://www.youtube.com/watch?v=zLyyW7-j9OU</a></p>

<p></p>

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17
Q

<p><span>What is current?</span></p>

A

<p><span>The charge transferred per second</span></p>

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18
Q

<p>What is meant by the potential difference (voltage) of a supply?</p>

A

<p>It is the number of Joules of energy given to each coulomb of charge passing through the cell</p>

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19
Q

<p>Which device measures current?</p>

A

<p>Ammeter</p>

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20
Q

<p>Which device measures voltage?</p>

A

<p>Voltmeter</p>

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21
Q

<p>Which device measures resistance?</p>

A

<p>Ohmmeter</p>

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22
Q

<p>What is the symbol for an ammeter?</p>

A

<p>Circle with an A in it.</p>

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23
Q

<p>What is the symbol for a voltmeter?</p>

A

<p>Circle with a V in it</p>

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24
Q

<p>What is the symbol for an Ohmmeter?</p>

A

<p>Circle with an Omega in it</p>

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25

How should an ammeter be connected to measure the current in a component?

It should be connected in series with the component

26

How should a voltmeter be connected to measure the voltage across a component?

It should be connected across the component

27

How can you identify a series circuit?

It is a circuit with only one path round it.

28

What is the rule for current in a series circuit?

The current is the same everywhere

I1=I2=I3

29

What is the rule for voltages in a series circuit?

The voltage across each component added together is equal to the supply voltage.

Vs=V1+V2+ ...

30

What happens if you unscrew one of the lamps in the circuit below? Why?

The other lamps go out.There is a break in the circuit and the current does not have a complete route to the battery.

31

If you heat a conductor, what happens to it's resistance?

It increases

32

How can a parallel circuit be identified?

It is a circuit with more than one path round it.

33

What is the rule for current in a parallel circuit?

The supply current is equal to the current in each branch added together.

 

IS = I1+I2+...

34

What is the rule for voltages in a parallel circuit?

The voltage across each branch is equal to the supply voltage.

VS=V1=V2= ....

35

Which circuit component is represented by the following diagram?

Cell

36

Which circuit component is represented by the following diagram?

Battery

37

Which circuit component is represented by the following diagram?

Switch

38

Which circuit component is represented by the following diagram?

Lamp

39

Which circuit component is represented by the following diagram?

Motor

40

Which circuit component is represented by the following diagram?

Loudspeaker

41

Which circuit component is represented by the following diagram?

Resistor

42

Which circuit component is represented by the following diagram?

Variable Resistor

43

Which circuit component is represented by the following diagram?

Thermistor

44

Which circuit component is represented by the following diagram?

Light Dependent Resistor

45

Which circuit component is represented by the following diagram?

Fuse

46

Which circuit component is represented by the following diagram?

Diode

47

Which circuit component is represented by the following diagram?

Light Emitting Diode

48

Which circuit component is represented by the following diagram?

Photovoltaic cell / solar cell

49

Which circuit component is represented by the following diagram?

Microphone

50

What is the energy chage in a battery?

Chemical to electrical

51

What is the energy change in a lamp?

Electrical to light (+ heat)

52

What is the energy change in a motor?

Electrical to kinetic

53

What is the energy change in a loudspeaker?

Electrical to sound

54

What is the energy change in a buzzer?

Electrical to sound

55

What is the energy change in an LED?

Electrical to light

56

What is the energy change in a photovoltaic cell?

Light to electrical

57

What is the energy change in a microphone?

Sound to electrical

58

What happens if you increase the resistance in a circuit?

The current will decrease

59

State two place a variable resistor can be used.

Light dimmer switch sped control on Scalextric cars volume control on a radio

60

State a device that can be used in a temperature sensor

Thermistor

61

State a device that can be used in a light sensor

LDR

62

What is a thermistor?

A resistor whose resistance changes with changes in temperature

63

What is a Light Dependent Resistor?

A resistor whose resistance changes with changes in light level

64

What is a fuse?

Safety device that protects the flex

65

Explain how a fuse works.

A fuse is a thin wire. If too much current passes through it, it will get hot and melt. This breaks the circuit.

66

How should a diode or LED be connected with a battery to light correctly?

Small line on battery points to small line on LED or diode.

67

Why is an LED normally connected in series with a resistor?

Resistor is to protect the LED by limiting the current in the LED.

68

What is the rule for selecting a fuse from a power rating?

Appliances less than 720W use a 3A fuse Appliances more than 720W use a 13A fuse

69

What is power?

The energy transferred  per second

70

What two factors effect the running cost of an appliance?

The time it is used for The power rating of the appliance

71

How can power losses be reduced in transmission lines?

By increasing the transmission voltage and so decreasing teh transmission current. Power loss P = I2R, so if the current is reduced the power lost is reduced.

72

Suggest a way that we say 'energy is lost' (not converted to the type of energy we want)?

  • Heat lost to the surroundings due to friction
  • Sound energy lost to air because of vibrations
  • Energy lost as heat to the surroundings
  • Heat lost in heating up a container instead of the substance in it
73

What happens if you unscrew one of the lamps in a parallel circuit?

Other lamps stay on as they still have a complete route to the battery.

74

What is the stated value of the mains?

230V, 50Hz

75

When would you use a relay?

To switch on a high current ciruit using a low current circuit for safety.

76

How does a relay work?

  • Close a switch to make a current flow in a wire.
  • This creates an electromagnet.
  • Electromagnet attracts metal switch.
  • This completes the second circuit and the lamp switches on.
77

Which component does the symbol represent?

Buzzer

78

What is the energy change in a buzzer?

Electrical to sound

79

What is meant by an analogue device?

A device that can take any value over a range

80

What is meant by a digital device?

A device that is either ON or OFF or can only take set values.

81

Name a digital input device.

Switch

82

Name an analogue input device.

LDR, Thermistor, microphone, solar cell

83

Name a digital output device

LED

84

Name an analogue output device

Loudspeaker, motor, lamp

85

Name an everyday device that gives an analogue reading.

A clock with hands, speedometer in car, analogue meter (has an arm that moves to give the reading)

86

Name an everyday device that gives a digital reading.

Digital clocks, digital stopwatch, multimeter readings

87

Suggest an output device that could give light out as a warning.

Lamp or LED

88

Suggest an output device that could make a sound as a warning.

Buzzer or Loudspeaker

89

Suggest an output device that could cause a fan to operate or to generate movement.

Motor

90

Suggest an imput device that could detect changes in temperature

Thermistor

91

Suggest an input device that could detect changes in light level

LDR (Light Dependent Resistor)

92

How would you work out total resistance in a series circuit?

Add the resistances together

RT=R1+R2+R3

93

Which logic gate is this?

AND

94

Which logic gate is this?

OR

95

Which logic gate is this?

NOT

96

When will an AND gate give a '1' or ON out?

When Input 1 AND Input 2 are ON or at '1'

97

When will an OR gate give a '1' or ON out?

When Input 1 is ON '1' OR Input 2 is ON '1' OR when Input 1 and Input 2 are ON '1'

98

How does a NOT gate work?

Put in an ON '1', get out an OFF '0'

Put in an OFF '0', get out an ON '1'

99

State Ohm's Law

V = IR

Voltage = Current x Resistance

100

State two methods of generating electrical energy

  • Solar cells
  • Wind turbines
  • Nuclear power station
  • Hydro electric
101

State an advantage of generating electrical energy by using wind turbines.

  • Does not produce greenhouse gases
  • Renewable so it will not run out
102

State a disadvantage of generating electrical energy by using wind turbines.

  • It may not always be windy enough to generate enough electrical energy
  • People object to them as they spoil the landscape
103

State an advantage of generating electrical energy by using solar cells.

  • Does not produce greenhouse gases
  • Renewable so it will not run out
104

State a disadvantage of generating electrical energy by using solar cells.

  • Many not have enough daylight to generate enough electrical energy
  • Can be expensive to install 
105

State an advantage of generating electrical energy by using nuclear power.

  • Does not produce any greenhouse gases
  • Produces a large amount of energy per kg of fuel
  • Fuel cells can be reprocessed an used again
106

State a disdvantage of generating electrical energy by using nuclear power.

  • Produces radioactive waste
  • The waste must be stored for hundreds of years
  • Expensive to build and decomission
  • If there is an accident radioactive material can be released into the environment
107

State an advantage of generating electrical energy by using hydro-electric.

  • Does not produce any greenhouse gases
  • The water is not used up in the process
108

State a disadvantage of generating electrical energy by using hydro-electric.

  • A dam must be built and land is flooded to create the water storage, this can damage the environment
  • Loss of control of water flow down stream
109

Which type of appliances consume the most energy?

Ones that are used for heating - kettle, electric shower etc.

110

What is the efiiciency of a device a measure of?

How good an appliance is at converting the input energy to the wanted output energy.

 A lamp converts electrical energy to light and heat, it would be more efficient if it did not produce heat.

111

How do you calculate efficiency?

Efficiency = (Useful energy out / Energy In ) x 100

OR

Efficiency = (Useful Power Out / Power In) x 100

112

If a power station is efficient, what is this on the environment?

  • Conserves resources (less input energy required to give the same output)
  • This can also reduce the impact on the environment
113

State two practical users of electromagnets.

  • Relays
  • Electric Bells
  • Loudspeakers
  • Fire door retainers
  • Maglev Trains
114

Why do we sometimes use an electromagnet instead of a permanent magnet?

An electromagnet can be switched on and off.

115

How can an electromagnet be constructed?

Wire wrapped wrapped round an iron nail. The ends of the wire connected to a battery.

116

How can the strength of an electromagnet be varied?

  • More turns of wire = stronger electromagnet
  • Less turns of wire = weaker electromagnet
  • Increase the current through the wire / voltage across the wire = stronger magnet
  • Decrease the current through the wire / voltage acrossthe wire = weaker magnet
117

What is the purpose of a transformer?

To increase or decrease a voltage

118

What does a step up transformer do?

Increases the voltage

119

What does a step down transormer do?

Decreases the voltage

120

Why are transformers used in electrical transmission lines?

To step up the voltage. This decreases the current and reduces the power lost in the transmission lines. At the other end a step down transformer reduces the voltage ready for use in the home.

121

What are the main parts of a transformer?

Primary Coli, Secondary Coil, Iron core

122

Give one advantage of using overhead cables.

  • Easy to access for repairs.
  • Easy to spot where a repair is required
123

Give a disadvantage of overhead cables.

  • They can look ugly in the countryside
  • High winds, heavy snow can bring them down
124

Give an advantage of underground cables.

  • They cannot be seen so do not effect the landscape
  • Will not be effected by snow or heavy winds
125

Give a disadvantage of underground cables

  • Have to dig them up for a repair
  • More difficult to find breaks
126

In a traditional power station (coal, gas or oil fired)  what are the main parts that help produce electrical energy?

  • Boiler
  • Turbine
  • Generator
127

What is the energy change in a boiler?

Chemical to heat

128

What is the energy change in a turbine? (Traditional power station)

Heat to Kinetic

129

What is the energy change in a generator?

Kinetic to electrical

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